Antique stick double stick pins

These are really nice. They don't register of 10kt. but I do believe they are a lower gold. They made, back in the day, lower karat gold jewelry. I personally have a ring of 6kt. They call these stick pins, or I saw somewhere something to do with mens collars. So honestly I don't know what these are other than they are at least 100 years old and "probably" gold. Really good shape for the age.